my dad is 71. has had 1 knee replaced, needs the other one and a hip done. but he won't do it cause his 1st 1 is still messed up. he can still get up and down on a creeper but he was a mechanic professionally for 47 yrs. he refers to himself as an "old guy or omf". when he goes out somewhere and people ask him how he is doing, he says "not bad for an old guy" and they laugh. he says " i ain't elderly, i'm just frickin old". he gets mad if someone says he is elderly. just like he gets mad when someone uses the word technician. he was a mechanic not a technician.